I was going to try this out but now I have a situation where zerotier central shows my VM as ONLINE, but zerotier-cli status on the client shows OFFINE. Perhaps this bug?
Regardless, with the relaxed validation on the form, would you expect name resolution to work from a remote client if I put “home” in the domain name and the ip address of my router (DNS server) in the SERVER ADDRESS field as mentioned in the OP?